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Finding the Fourth Proportional to 664,517.70, 996,922.35 and 215,162.10

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Solution

The fourth proportional to 664,517.70, 996,922.35 and 215,162.10 is: 322,790.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,517.70 : 996,922.35 = 215,162.10 : x
  2. Step 2: Convert to fraction form
    664,517.70/996,922.35 = 215,162.10/x
  3. Step 3: Cross multiply
    664,517.70x = 996,922.35 × 215,162.10
  4. Step 4: Simplify right side
    664,517.70x = 214,499,906,362.94
  5. Step 5: Solve for x
    x = 214,499,906,362.94/664,517.70
  6. Step 6: Final answer
    x = 322,790.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.